Sanding wheel



Feb. 21, 1939. E B H B RD 2,147,901

SANDING WHEEL Filed May 2, 1958 Ewe/2TB. HUBBARD Patented Feb. 21, 1939 UNITED STATES PATENT OFFICE SANDING WHEEL Application May 2, 1938, Serial No. 205,567

4 Claims. (01. 51-494) This invention relates to a sanding wheel for use in furniture manufacturing, wood working, and the like, and is adapted to be formed of some suitable resilient material with a sanding or finishing strip secured to the periphery thereof.

It is an object of this invention to provide a sanding wheel the rim of which is composed of suitable resilient material such as rubber, said rim having transverse grooves in its periphery in which the loops of a finishing or sanding strip are adapted to fit. This strip is secured upon the periphery of the wheel by pivoted retainers disposed in each of the grooves, the retainers having their free ends latched in a common disk which is mounted upon the axis of rotation of the wheel It is a further object of the invention to pro- .Vide a sanding wheel of the class described, in which retainers are provided for holding a sanding strip in contact with the periphery thereof,

said retainers having hooked portions engaging a common disk and being held in clamped position with the disk, by the centrifugal force of the wheel as it is rotated. By providing this type of a latch connection, it is evident that the disk does not have to be secured upon the wheel by any other means than that of the hooks on the individual retainer members. Also, it makes the removal or the replacement of the sanding strip much more easy than would be the case should the common disk, which holds the retainers in position, be secured on the shaft by other means such as a nut.

Some of the objects of the invention having been stated, other objects will appear as the description proceeds, when taken in connection With the accompanying drawing, in which- Figure 1 is an end elevation of a sanding wheel made in accordance with my'invention;

Figure 2 is a top plan View of Figure 1;

Figure 3 is a longitudinal sectional view taken along the line 3-3 in Figure 1;

Figure 4 is a transverse sectional view taken along the line 44 in Figures 2 and 3.

Referring more particularly to the drawing, the numeral Ill denotes a suitable spindle which has a restricted portion I I upon which is mounted a metallic hub I2. This hub has integral therewith a flange I4 and a body portion I5. Mounted upon the periphery of the body portion I5 and normally pressed against flange I4, is a rim I6, which is preferably made of some suitable resilient material such as rubber. The rim I6 is held upon the body portion I5, and against the side of flange I4 by means of a suitable cap I8 which has an annular flange I 9 for contacting the side of rim portion I6 and for pressing it against the flange I 4. Disposed in the central portion of member I8 is a suitable cavity 2|, which cavity is concentric with the restricted portion II and the member l8. The base of this cavity is contacted by a suitable nut 22 which is threadably secured around restricted portion II and which normally presses the left-hand portion of member I8 against the right-hand portion of body portion I5 (Figure 3). v

In order to properly place the member I8 on the shaft II in the same relative position to the body portion I5 at all times, a suitable pin. 26 projects laterally from the right-hand face of member I5 and is adapted to penetrate a suitable cavity 2! in member I 8.

The rim I6 has a plurality of spaced, transverse peripheral grooves 28 into'which the loops of a sanding strip 29 are adapted to fit. The loops in this strip 29 are held against the base of these grooves and against the resilient material I6 by means of suitable dogs or retainers 30, said retainers being pivoted at one end to ring 3| which is secured to the back of hub I2 by any suitable means such as plates 32 and screws 33. Spaced slots I la are cut in flange I4 to allow the desired rotation of retainers 30.-

Retainers have integral therewith a portion which projects at right angles thereto, and toward the center of the wheel. Each of the portions 34 has a notch cut therein which hooks around portion 36, which portion bridges ,a slot 31 in a disk 38. Disk 38v has a hole in the center thereof which loosely fits around the end of shaft II. Each inturned portion 34 is disposed in slots I2a, I8a and 31 in the'members I2, I8 and 38, respectively, when the retainers are in latched position (Figure 3).

In order to place the disk 38 around the shaft II in the same relative position with respect to member I3, a suitable pin 40 has been provided which extends from the face of member I8 and penetrates a suitable hole 4| in the disk.

It is seen by referring to Figure 1 that the end 34 of each of these retainer members 30, penetrates a slot 31 in the disk 38, and it is also seen that the slots and their associated retaining members are radially disposed with respect to the portion II of spindle I0. Therefore, when the wheel is rotating, the centrifugal force will tend to rotate members 30 outwardly and away from shaft I I, which, of course, will hold the hooks in the portions 34 against the member 36 more firmly than ever. Of course, there is an additional tendency to force the hooks into engagement with the members 36 by virtue of the resistance of the sanding strip to bending and also due to the resilient material from which the rim I6 is made and since this material is normally compressed when the retainer 30 is in latched position, it is evident that the retainers would remain latched even though the wheel was stationary.

By providing such a structure it is seen that the retainers 30 can be easily disconnected from or connected to the common disk 38 so that 'a sanding strip 29 may be removed or replaced very quickly.

The cross-sectional area'of the rim I6 is made to conform to the type of work piece upon which the wheel is to be used. In other words, the shape of groove in the periphery of the wheel is frequently changed to suit working conditions. Nevertheless, such alterations do not'affect the novel means which has been provided for securing the sanding strip in position on the rim, as the abrasive strip, due to centrifugal force, conforms to the shape of the groove 45.

In the drawing and specification, there has been set forth a preferred embodiment of the invention, and although specific terms are employed, they are used in a generic and descriptive sense only, and not for purposes of limitation the scope of the invention being set forth in the appended claims.

I claim:

1. A sanding wheel comprising a hub member having an axial hole therethrough adapted to fit on a shouldered shaft having its end threaded, said hub having a flange extending radially from one side thereof, a resilient annular member disposed on said hub and having a plurality of transverse peripheral grooves, said flange having a plurality of transverse peripheral grooves coinciding with the grooves in the annular member, a circular wire member secured to the outer surface of said flange, a plurality of retaining members pivoted at one end to said wire, a sanding strip surrounding said annular member and having U-shaped loops extending into said peripheral grooves in said annular member, said retaining members being adapted to be swung on their pivot into said loops, means for releasably confining said hub on said shaft and also confining said annular member on said hub, the free ends of said retaining members having outwardly extending hooks thereon, a co'ncavoconvex disk loosely fitting over the threaded end of said shaft and having radially disposed slots therein closed at their outer ends and into which the hooks on said retaining members are adapted to fit for retaining the sanding strip on said annular member.

2. Abrasive and polishing apparatus comprising a wheel having a plurality of transverse peripheral grooves, a sanding strip surrounding said Wheel and having loops extending into said grooves, a plurality of retaining members pivoted at one end at one side of the wheel and adapted to lie in said loops, said retaining members having each a hook on the free outer end thereof,

and adisk mounted for floating movement on said shaft and having a plurality of perforations therein adapted to be penetrated by said hooks to hold the retaining members in position to retain the sanding strip on said Wheel, said hooks also serving to retain said disk on said shaft.

3. Abrasive and polishing apparatus comprising a shaft threaded at one end and having a shoulder spaced from the threaded portion, a hub member disposed on said shaft and having one side fitting against said shoulder, an annular resilient member disposed on said hub and having a plurality of transverse peripheral grooves therein, a. disk adapted to fit against the other side of said hub and against said annular member, a nut threadably disposed on said shaft for pressing said disk against said hub and said annular member, a sanding strip surrounding said annular member and having a plurality of loops extending into said transverse peripheral grooves, a plurality of retaining members pivoted at one end to the side of the hub disposed next to said shoulder and adapted to lie in said loops, said retaining members having a hook on their free ends, a disk mounted for floating movement on said shaft and provided with a plurality of radially disposed slots therein closed at their outer ends and into which the free ends of the retaining members are adapted to project.

4. A sanding wheel having a plurality of transverse peripheral grooves, a sanding strip surrounding said wheel, and having a plurality of loops extending into said grooves, a plurality of retaining members pivoted at one end to the wheel and having hooks on their free ends and being adapted to lie in said loops, and a floating disk having a plurality of radially disposed slots therein which are closed at their outer ends and into which the hooks on said retaining members are adapted to project to thereby retain said sanding strip in position on said sanding wheel.

ELBERT B. HUBBARD. 

